(Phy) heat question
A cup of mass 0.04 kg contains water of 0.1 kg at 10度.How much boiling water must be added to the cup to raise its temperature to 40度?
( the specific heat capacity of the cup is 700 jkg-1度-1) 回復 1# myloveareyou
點解依家重有人問phy既-口-''
0.04x700(40-10)+0.1x4200x(100-10)=mx2.26x10^6
38640=mx2.26x10^6
m=0.01709...
m≈0.02kg
總覺得做錯-口-'' 本帖最後由 【YU】 於 24-4-2010 22:09 編輯
緊係錯啦,人地寫明boiling water, 你仲做乜加個 latent heat of vaporisation 落去呢?
0.1 x 4200 x (40-10) + 0.04 x 700 x (40-10) = m x 4200 x (100-40) 緊係錯啦,人地寫明boiling water, 你仲做乜加個 latent heat of vaporisation 落去呢?
0.1 x 4200 x (40-1 ...
【YU】 發表於 24-4-2010 22:08 http://nakuz.com/bbs/images/common/back.gif
係啵...
閣下果然屈-3- 我從來都唔屈人 我從來都唔屈人
【YU】 發表於 25-4-2010 12:44 http://www.nakuz.com/bbs/images/common/back.gif
但係你成日屈人機喎 無D咁既事.
我只係講返個事實出黎je.
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